//
// execution/detail/as_receiver.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2022 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//

#ifndef ASIO_EXECUTION_DETAIL_AS_RECEIVER_HPP
#define ASIO_EXECUTION_DETAIL_AS_RECEIVER_HPP

#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)

#include "asio/detail/config.hpp"
#include "asio/detail/type_traits.hpp"
#include "asio/traits/set_done_member.hpp"
#include "asio/traits/set_error_member.hpp"
#include "asio/traits/set_value_member.hpp"

#include "asio/detail/push_options.hpp"

namespace asio {
    namespace execution {
        namespace detail {

            template<typename Function, typename>
            struct as_receiver {
                Function f_;

                template<typename F>
                explicit as_receiver (ASIO_MOVE_ARG(F)

                f, int)
                :

                f_ (ASIO_MOVE_CAST(F)(f)) {
                }

#if defined(ASIO_MSVC) && defined(ASIO_HAS_MOVE)
                as_receiver(as_receiver&& other)
                  : f_(ASIO_MOVE_CAST(Function)(other.f_))
                {
                }
#endif // defined(ASIO_MSVC) && defined(ASIO_HAS_MOVE)

                void set_value()

                ASIO_NOEXCEPT_IF (noexcept(declval<Function &>()())) {
                    f_();
                }

                template<typename E>
                void set_error(E)

                ASIO_NOEXCEPT
                {
                    std::terminate();
                }

                void set_done()

                ASIO_NOEXCEPT
                {
                }
            };

            template<typename T>
            struct is_as_receiver : false_type {
            };

            template<typename Function, typename T>
            struct is_as_receiver<as_receiver<Function, T> > : true_type {
            };

        } // namespace detail
    } // namespace execution
    namespace traits {

#if !defined(ASIO_HAS_DEDUCED_SET_VALUE_MEMBER_TRAIT)

        template<typename Function, typename T>
        struct set_value_member<
                asio::execution::detail::as_receiver<Function, T>, void()> {
            ASIO_STATIC_CONSTEXPR(bool, is_valid = true);

#if defined(ASIO_HAS_NOEXCEPT)
            ASIO_STATIC_CONSTEXPR(bool,
                is_noexcept = noexcept(declval<Function&>()()));
#else // defined(ASIO_HAS_NOEXCEPT)

            ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);

#endif // defined(ASIO_HAS_NOEXCEPT)
            typedef void result_type;
        };

#endif // !defined(ASIO_HAS_DEDUCED_SET_VALUE_MEMBER_TRAIT)

#if !defined(ASIO_HAS_DEDUCED_SET_ERROR_MEMBER_TRAIT)

        template<typename Function, typename T, typename E>
        struct set_error_member<
                asio::execution::detail::as_receiver<Function, T>, E> {
            ASIO_STATIC_CONSTEXPR(bool, is_valid = true);

            ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);

            typedef void result_type;
        };

#endif // !defined(ASIO_HAS_DEDUCED_SET_ERROR_MEMBER_TRAIT)

#if !defined(ASIO_HAS_DEDUCED_SET_DONE_MEMBER_TRAIT)

        template<typename Function, typename T>
        struct set_done_member<
                asio::execution::detail::as_receiver<Function, T> > {
            ASIO_STATIC_CONSTEXPR(bool, is_valid = true);

            ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);

            typedef void result_type;
        };

#endif // !defined(ASIO_HAS_DEDUCED_SET_DONE_MEMBER_TRAIT)

    } // namespace traits
} // namespace asio

#include "asio/detail/pop_options.hpp"

#endif // ASIO_EXECUTION_DETAIL_AS_RECEIVER_HPP
